Refactor channel dispatchers on the host side.

remoting/protocol/protobuf_video_writer.cc

Index: remoting/protocol/protobuf_video_writer.cc
diff --git a/remoting/protocol/protobuf_video_writer.cc b/remoting/protocol/protobuf_video_writer.cc
index 88941c42e6adb6572b7a67c3c8d0896c708fc89a..5a85249d53b59b013f7d5de727682935293c3c74 100644
--- a/remoting/protocol/protobuf_video_writer.cc
+++ b/remoting/protocol/protobuf_video_writer.cc
@@ -9,7 +9,6 @@
 #include "net/socket/stream_socket.h"
 #include "remoting/base/constants.h"
 #include "remoting/proto/video.pb.h"
-#include "remoting/protocol/rtp_writer.h"
 #include "remoting/protocol/session.h"
 #include "remoting/protocol/util.h"
 
@@ -20,7 +19,9 @@ ProtobufVideoWriter::ProtobufVideoWriter(base::MessageLoopProxy* message_loop)
     : buffered_writer_(new BufferedSocketWriter(message_loop)) {
 }
 
-ProtobufVideoWriter::~ProtobufVideoWriter() { }
+ProtobufVideoWriter::~ProtobufVideoWriter() {
+  Close();
+}
 
 void ProtobufVideoWriter::Init(protocol::Session* session,
                                const InitializedCallback& callback) {